STM32 MCUs Boards and hardware tools

Ask questions and find answers on STM32 hardware set-ups, including schematic-related challenges, debugging probes, power configurations, and more.

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Resolved! 3.3V external power supply

Hi everyone, I need to power my F401RE with a 3.3V external power source. I read in the datasheet I need to connect the power source to the CN7 pin 12 or CN7 pin 16. Where do I connect GND signal apart from 3.3V signal?Also, from what I understood, I...

Problem with the nRST pin in a STM32L021K4

I already read this post with no success: https://community.st.com/s/question/0D50X00009Xka0fSAB/problem-with-the-nrst-pin-in-a-stm32f100cbt6I tried to design a simple board with a STM32L021K4 and to program it with a STLINK-v3 MINI. I got the follow...

LFIAC.1 by Associate II
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Resolved! Internal RTC clock lag issue

I am using below componnet toolsMCU: STM32H7B3IIT6IDE: STM32CubeIDE Version: 1.9.0CRYSTAL: RT3215-32.768-12.5-TR ( 32.7680KHZ 12.5PF)I work with internal RTC. I will use for clock. But RTC clock behinds real clock. While the product is running, the l...